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// Test Suite for C-API LineString project functions
#include <tut/tut.hpp>
// geos
#include <geos_c.h>
#include "capi_test_utils.h"
namespace tut {
//
// Test Group
//
// Common data used in test cases.
struct test_capiproject_data : public capitest::utility {};
typedef test_group<test_capiproject_data> group;
typedef group::object object;
group test_capiproject_group("capi::GEOSProject");
//
// Test Cases
//
// Test basic usage
template<>
template<>
void object::test<1>
()
{
geom1_ = GEOSGeomFromWKT("LINESTRING (0 0, 0 2)");
geom2_ = GEOSGeomFromWKT("POINT (1 1)");
double dist = GEOSProject(geom1_, geom2_);
ensure_equals(dist, 1.0);
double dist_norm = GEOSProjectNormalized(geom1_, geom2_);
ensure_equals(dist_norm, 0.5);
}
// Test non-linestring geometry (first argument) correctly returns -1.0
template<>
template<>
void object::test<2>
()
{
geom1_ = GEOSGeomFromWKT("POLYGON ((0 0, 0 1, 1 1, 1 0, 0 0))");
geom2_ = GEOSGeomFromWKT("POINT (1 1)");
double dist = GEOSProject(geom1_, geom2_);
ensure_equals(dist, -1.0);
double dist_norm = GEOSProjectNormalized(geom1_, geom2_);
ensure_equals(dist_norm, -1.0);
}
// Test non-point geometry (second argument) correctly returns -1.0
// https://trac.osgeo.org/geos/ticket/1058
template<>
template<>
void object::test<3>
()
{
geom1_ = GEOSGeomFromWKT("LINESTRING (0 0, 0 2)");
geom2_ = GEOSGeomFromWKT("LINESTRING (0 0, 0 2)");
double dist = GEOSProject(geom1_, geom2_);
ensure_equals(dist, -1.0);
double dist_norm = GEOSProjectNormalized(geom1_, geom2_);
ensure_equals(dist_norm, -1.0);
}
// Test
// https://github.com/libgeos/geos/issues/475
template<>
template<>
void object::test<4>
()
{
geom1_ = GEOSGeomFromWKT("LINESTRING (0 0, 0 0)");
geom2_ = GEOSGeomFromWKT("POINT (0 0)");
double dist = GEOSProject(geom1_, geom2_);
ensure_equals(dist, 0.0);
double dist_norm = GEOSProjectNormalized(geom1_, geom2_);
ensure_equals(dist_norm, 0.0);
}
// Test invalid value warning
// https://github.com/shapely/shapely/issues/1796
template<>
template<>
void object::test<5>
()
{
geom1_ = GEOSGeomFromWKT("LINESTRING (0 0, 1 1, 1 1, 2 2)");
geom2_ = GEOSGeomFromWKT("POINT (0 1)");
std::feclearexcept(FE_ALL_EXCEPT);
double dist = GEOSProject(geom1_, geom2_);
ensure("FE_INVALID raised", !std::fetestexcept(FE_INVALID));
ensure_equals("GEOSProject", dist, 0.7071, 0.0001);
std::feclearexcept(FE_ALL_EXCEPT);
double dist_norm = GEOSProjectNormalized(geom1_, geom2_);
ensure("FE_INVALID raised", !std::fetestexcept(FE_INVALID));
ensure_equals("GEOSProjectNormalized", dist_norm, 0.25);
}
} // namespace tut
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